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Syoyo Fujita
2013-04-25 01:10:55 -07:00
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<h1>Tiny obj loader</h1>
<p>Tiny but powerful single file wavefront obj loader</p>
<hr>
<span class="credits left">Project maintained by <a href="https://github.com/syoyo">syoyo</a></span>
<span class="credits right">Hosted on GitHub Pages &mdash; Theme by <a href="http://twitter.com/#!/michigangraham">mattgraham</a></span>
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<h1>tinyobjloader</h1>
<p>Tiny but poweful single file wavefront obj loader written in C++. No dependency except for C++ STL. It can parse 10M over polygons with moderate memory and time.</p>
<p>Good for embedding .obj loader to your (global illumination) renderer ;-)</p>
<h2>Features</h2>
<ul>
<li>Group</li>
<li>Vertex</li>
<li>Texcoord</li>
<li>Normal</li>
<li>Material
<ul>
<li>Unknown material attributes are treated as key-value.</li>
</ul>
</li>
</ul><h2>Notes</h2>
<p>Polygon is converted into triangle.</p>
<h2>Usage</h2>
<pre><code>std::string inputfile = "cornell_box.obj";
std::vector&lt;tinyobj::shape_t&gt; shapes;
std::string err = tinyobj::LoadObj(shapes, inputfile.c_str());
if (!err.empty()) {
std::cerr &lt;&lt; err &lt;&lt; std::endl;
}
std::cout &lt;&lt; "# of shapes : " &lt;&lt; shapes.size() &lt;&lt; std::endl;
for (size_t i = 0; i &lt; shapes.size(); i++) {
printf("shape[%ld].name = %s\n", i, shapes[i].name.c_str());
printf("shape[%ld].indices: %ld\n", i, shapes[i].mesh.indices.size());
assert((shapes[i].mesh.indices.size() % 3) == 0);
for (size_t f = 0; f &lt; shapes[i].mesh.indices.size(); f++) {
printf(" idx[%ld] = %d\n", f, shapes[i].mesh.indices[f]);
}
printf("shape[%ld].vertices: %ld\n", i, shapes[i].mesh.positions.size());
assert((shapes[i].mesh.positions.size() % 3) == 0);
for (size_t v = 0; v &lt; shapes[i].mesh.positions.size() / 3; v++) {
printf(" v[%ld] = (%f, %f, %f)\n", v,
shapes[i].mesh.positions[3*v+0],
shapes[i].mesh.positions[3*v+1],
shapes[i].mesh.positions[3*v+2]);
}
printf("shape[%ld].material.name = %s\n", i, shapes[i].material.name.c_str());
printf(" material.Ka = (%f, %f ,%f)\n", shapes[i].material.ambient[0], shapes[i].material.ambient[1], shapes[i].material.ambient[2]);
printf(" material.Kd = (%f, %f ,%f)\n", shapes[i].material.diffuse[0], shapes[i].material.diffuse[1], shapes[i].material.diffuse[2]);
printf(" material.Ks = (%f, %f ,%f)\n", shapes[i].material.specular[0], shapes[i].material.specular[1], shapes[i].material.specular[2]);
printf(" material.Tr = (%f, %f ,%f)\n", shapes[i].material.transmittance[0], shapes[i].material.transmittance[1], shapes[i].material.transmittance[2]);
printf(" material.Ke = (%f, %f ,%f)\n", shapes[i].material.emission[0], shapes[i].material.emission[1], shapes[i].material.emission[2]);
printf(" material.Ns = %f\n", shapes[i].material.shininess);
printf(" material.map_Ka = %s\n", shapes[i].material.ambient_texname.c_str());
printf(" material.map_Kd = %s\n", shapes[i].material.diffuse_texname.c_str());
printf(" material.map_Ks = %s\n", shapes[i].material.specular_texname.c_str());
printf(" material.map_Ns = %s\n", shapes[i].material.normal_texname.c_str());
std::map&lt;std::string, std::string&gt;::iterator it(shapes[i].material.unknown_parameter.begin());
std::map&lt;std::string, std::string&gt;::iterator itEnd(shapes[i].material.unknown_parameter.end());
for (; it != itEnd; it++) {
printf(" material.%s = %s\n", it-&gt;first.c_str(), it-&gt;second.c_str());
}
printf("\n");
}
</code></pre>
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